mirror of
https://github.com/a2-4am/passport.git
synced 2024-05-28 21:41:27 +00:00
28 lines
805 B
Plaintext
28 lines
805 B
Plaintext
|
;-------------------------------
|
||
|
; #BADEMU2
|
||
|
; RWTS checks for timing bit by
|
||
|
; checking if data latch is still
|
||
|
; $D5 after waiting "too long"
|
||
|
; but this confuses legacy emulators
|
||
|
; (AppleWin, older versions of MAME)
|
||
|
; so we patch it for compatibility
|
||
|
; e.g. Dinosaur Days
|
||
|
;-------------------------------
|
||
|
_bademu2
|
||
|
lda gIsRWTS ; if DOS 3.3 RWTS
|
||
|
bne bademu2_exit
|
||
|
lda #$03
|
||
|
ldx #$4F
|
||
|
ldy #$11
|
||
|
jsr compare ; and T00,S03,$4F ==
|
||
|
!byte $BD,$8C,$C0,$10,$FB,$4A,$C9,$6A
|
||
|
!byte $D0,$EF,$BD,$8C,$C0,$C9,$D5,$F0
|
||
|
!byte $12
|
||
|
bcs bademu2_exit
|
||
|
lda #$03
|
||
|
ldx #$59
|
||
|
ldy #$02
|
||
|
jsr modify ; and set T00,S03,$59 =
|
||
|
!byte $F0,05
|
||
|
bademu2_exit
|